For commissioner Santamaria and captain Franchard, the 15 year old hunt on crime king Antoine Letellier, who owns several casinos, is top priority. Ever-perceptive Kévin Laporte and street-wise Alex Moreno surprise (mainly themselves) pleasantly investigating the presumed kidnapping of a woman who refuses to sell out to Letellier. Kevin also learns his ma now lives with Franchard. Laura imposed herself as partner on captain Manuel Leroux investigating the fate of accomplice Krantz, who was about to betray Letellier's secret dealing, but is in unsuspected grave danger. Lyes's self-control is pushed to the limit by Aziz Merzouag, caught red-handed with illegal arms, who insults and threatens his family.